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<b>let </b><font color="Maroon">X</font> be  non <a href="struct_0.html#V3">empty</a> <a href="pre_topc.html#NM1">TopSpace</a>;<br/>

<div><b>hereby </b>
<div class="add"><b>assume </b><a NAME="E1:55_1"/><i><font color="Green">E16</font></i>: 
<font color="Maroon">X</font> is <a href="tdlat_3.html#V3">almost_discrete</a>
 ;<br/><b>assume </b><a NAME="E2:55_1"/>
 ex <font color="Olive">A</font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">X</font> st <br/>( <font color="Olive">A</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">X</font> &amp; <font color="Olive">A</font> is <a href="tops_3.html#V1">everywhere_dense</a> )
 ;<br/><b>then consider </b><font color="Maroon">A</font> being   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">X</font><b> such that </b><br/><a NAME="E4:55_1"/><i><font color="Green">E17</font></i>: 
<font color="Maroon">A</font> is <a href="tops_3.html#V1">everywhere_dense</a>
 <b>and </b><br/><a NAME="E5:55_1"/><i><font color="Green">E23</font></i>: 
<font color="Maroon">A</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">X</font>
 ;<br/><div><a class="txt" onclick="hs2(this)" href="javascript:()" title="55_1_1"><b>now </b></a><div class="add"><b>reconsider </b><font color="Maroon">B</font> = <font color="Maroon">A</font> <a href="subset_1.html#K3">`</a>  as  non <a href="xboole_0.html#V1">empty</a> <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">X</font> <b>by </b><i>, <a class="ref" href="tops_3.html#T2">TOPS_3:2</a></i>;<br/><b>take </b><font color="Maroon">B</font> = <font color="Maroon">B</font>;<br/><b>thus </b><a NAME="E2:55_1_1"/>
<font color="Maroon">B</font> is <a href="tops_1.html#V3">nowhere_dense</a>
 <b>by </b><i>, <a class="ref" href="tops_3.html#T39">TOPS_3:39</a></i>;<br/></div><b>end;</b></div><b>hence </b><a NAME="E7:55_1"/>
contradiction
 <b>by </b><i><a class="txt" href="tex_1.html#E5:55"><i><font color="Green">E25</font></i></a>, <a class="txt" href="tex_1.html#E5:55_1"><i><font color="Green">E23</font></i></a></i>;<br/></div>
<b>end;</b></div>

<b>assume </b><a NAME="E2:55"/><i><font color="Green">E24</font></i>: 
for <font color="Olive">A</font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">X</font>  st <font color="Olive">A</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">X</font> holds <br/> not <font color="Olive">A</font> is <a href="tops_3.html#V1">everywhere_dense</a>
 ;<br/>

<b>assume </b><a NAME="E3:55"/>
not <font color="Maroon">X</font> is <a href="tdlat_3.html#V3">almost_discrete</a>
 ;<br/>

<b>then consider </b><font color="Maroon">A</font> being  non <a href="xboole_0.html#V1">empty</a> <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">X</font><b> such that </b><br/><a NAME="E5:55"/><i><font color="Green">E25</font></i>: 
<font color="Maroon">A</font> is <a href="tops_1.html#V3">nowhere_dense</a>
 <b>by </b><i/>;<br/>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="55_2"><b>now </b></a><div class="add"><b>take </b><font color="Maroon">B</font> = <font color="Maroon">A</font> <a href="subset_1.html#K3">`</a> ;<br/><b>thus </b><a NAME="E1:55_2"/>
( <font color="Maroon">B</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">X</font> &amp; <font color="Maroon">B</font> is <a href="tops_3.html#V1">everywhere_dense</a> )
 <b>by </b><i>, <a class="ref" href="tops_3.html#T1">TOPS_3:1</a>, <a class="ref" href="tops_3.html#T40">TOPS_3:40</a></i>;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E7:55"/>
contradiction
 <b>by </b><i><a class="txt" href="tex_1.html#E5:55"><i><font color="Green">E25</font></i></a></i>;<br/>


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